synchronous multiuser DS-CDMA
Multiuser Detection for Synchronous DS-CDMA in AWGN Channel
... linear multiuser detectors and non-linear detectors. In linear multiuser detection, a linear mapping (transformation) is applied to the soft outputs of the conventional detector to produce a new set of ...
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Support Vector Machine Multiuser Receiver for DS CDMA Signals in Multipath Channels
... attractive multiuser scheme that allows users to transmit at the same carrier fre- quency in an uncoordinated ...creates multiuser interference (MUI) which, if not controlled, can seriously degrade the ...
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Ant Colony Based Multiuser Detection for MC DS CDMA Systems
... the synchronous MC DS-CDMA ...single-carrier DS-CDMA system’s MUD of [22] to a multi- carrier DS-CDMA system ...MC DS-CDMA are ...
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Performance of Reverse Link Synchronous DS CDMA System on a Frequency Selective Multipath Fading Channel with Imperfect Power Control
... of DS-CDMA system is mainly limited by multiple-access interference (MAI), and thus techniques to reduce the MAI, such as multiuser detection or interfer- ence cancellation, are currently of great ...
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A MUSIC Based Algorithm for Blind User Identification in Multiuser DS CDMA
... Since the received signal r comprises only K authentic spreading codes, in order to resolve the ambiguity and dis- tinguish between the authentic and false solutions, we have to somehow inspect the relation of each ...
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Analysis of a Combined Antenna Arrays and Reverse Link Synchronous DS CDMA System over Multipath Rician Fading Channels
... Yong-Seok Kim received his B.S. degrees in electronic engineering from the Kyung Hee University, Yongin-si, Korea, in 1998, and M.S. and Ph.D. degrees in communication systems from Yonsei University, Seoul, Ko- rea, in ...
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Blind Per Survivor Processing Based Multiuser Detection for Channel Coded Multi Carrier DS CDMA Systems
... Subsequently, we analyse the performance of the synchronous MC DS-CDMA system considered, when employing three different channel coding schemes, namely Low Density Parity Check LDPC code[r] ...
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Performance Analysis of Multi User Detectors for Synchronous DS CDMA Systems
... linear multiuser detectors and conventional single user matched filter in DS-CDMA ...in synchronous AWGN channel, and Gold sequence and Kasami sequence are utilized as the spreading ...Linear ...
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An Iterative Multiuser Detector for Turbo-Coded DS-CDMA Systems
... As the cross-correlation between users in a synchronous CDMA systems increases from 0.25 to 0.3, we observed the breakdown in performance of the detector of [9]. Our pro- posed receiver, however, continues ...
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Spectrally Efficient Four Dimensional M-ary QAM for Synchronous DS-CDMA
... (36) It has been assumed in deriving (36) that (i) all MA signal powers are controlled at constant level and (ii) L, the number of multiple users is large and the multiuser (MU) interference approaches a Gaussian ...
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Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems
... in DS/CDMA over flat-fading channels based on a genetic algorithm (GA) in- ...GA-based multiuser detection has been proposed, ...GA-based multiuser detector can also be applied to symbol ...
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Blind linear multiuser detection for DS-CDMA wireless networks
... • C h a p te r 7: C o n str a in e d C M A -b a sed C o d e A c q u is itio n S c h e m e Unlike Chapter 3 to 6, the focus of Chapter 7 is on the problem of code acquisition, or the estimation of time delay of the ...
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DIMINISHED COMPLEXITY GENETIC ALGORITHM AIDED AND RADIAL BASIS FUNCTION ASSISTED MULTIUSER DETECTION FOR SYNCHRONOUS CDMA
... of CDMA frameworks amid the most recent ten years. The DS/CDMA recipients are isolated into Single client and Multiuser ...a multiuser recipient together distinguishes a few clients ...
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Broadband MC DS CDMA Using Space Time and Frequency Domain Spreading
... MC DS-CDMA scheme, which employs STS assisted transmit diversity and time-frequency-domain (TF-domain) ...MC DS-CDMA system is determined by the product of the T-domain spreading factor and ...
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Multiuser Delay Tracking CDMA Receiver
... As seen in Section 4, the user-delay variation in a prac- tical system is far less than that used in our simulations. In our simulations, we have averaged the time delay error over a block of M = 9 symbols to filter out ...
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Antenna Diversity Assisted Genetic Algorithm Based Multiuser Detection Schemes for Synchronous CDMA Systems
... Abstract—A spatial diversity reception assisted multiuser code-division multiple-access detector based on genetic algorithms (GAs) is proposed. Two different GA-based individual-selection strategies are ...
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A Unified Approach to the Analysis of Multicarrier DS CDMA over Nakagami $M$ Fading Channels
... multicarrier DS-CDMA (MC DS-CDMA) schemes is defined and its performance is considered over multipath Nakagami- m fading ...MC DS-CDMA scheme is a variable, allowing us to gain ...
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Genetic Algorithm Based Antenna Diversity Assisted Multiuser Detection for Synchronous CDMA Systems
... In our rst approach the so-called individuals of the GA are chosen for selection based purely on the sum of their corresponding gures of merit associated with the individual antennas, an[r] ...
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Performance of multiuser decision-feedback detector for flat Rayleigh fading synchronous CDMA channels
... We compare the decision-feedback detector with the conventional detector and the decorrelator. The average error rate of the conventional detector is evaluated using the result for distr[r] ...
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Subspace Based Blind and Group Blind Space Time Multiuser Detection for the Generalized Multicarrier DS CDMA Uplink
... MC DS-CDMA system of [12], since subspace-based estimation techniques [4], [10], [11] are ca- pable of extracting the channel estimates ...MC DS-CDMA system of [12] for the sake of improving ...
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